Removing oil from a compressor with only an oil fill plug is performed using the following general guidelines: 1. If possible, run the compressor fully…

Removing oil from a compressor with a drain plug is performed using the following general guidelines: 1. If possible, run the compressor fully loaded. Then…

The closed system method uses the refrigeration oil pump to charge oil into the compressor crankcase. The closed system method is performed on an operating…

When adding oil to a compressor, there is a danger of introducing contaminants into the refrigeration system. This can be prevented by adding oil to…

Purpose — It is important to maintain the proper oil level in the compressor to ensure proper lubrication. This is necessary to avoid possible mechanical…

Oil acid test kits (Figure SP-5-2) require that an oil sample be taken from the system. The test is performed following the specific instructions supplied…

Some sealed-tube test kits like TOTALTEST® can measure the acid/moisture content in refrigerant vapor without the need for an oil sample. The TOTALTEST® procedure is…

Air entering a system contains moisture. Moisture in the refrigerant can create oil sludge, which reduces the lubrication properties of the oil and plugs oil…

Purpose — Refrigeration systems are intended to contain only refrigerant and oil. Anything else in the closed system is considered a contaminant. Contaminants such as…